Machine for producing files and rasps.



G. PEISELBR. MACHINE FOR PRODUCIN G FILES AND BASPS. AEPLIUATION FILEDwe. 24, 1909.

957,367., Patented May 10, 1910.

@FEIQLAQIGD GOTTLIEB PEISELER, OF REMSGHEID-HADDENBACH, GERMANY.

MACHINE FOR PRODUCING FILES AND RASPS.

Specification of Letters Patent.

Patented May 10 191M).

Application filed August 24, 1909. Serial No. 514,424.

To all whom it may concern:

Be it known that I, Gorrninn PEISELER, a citizen of the German Empire,residing at Remscheid-Haddenbach, in the Province of Rhenish Prussia andKingdom of Prussia, Germany, have invented certain new and usefulImprovements in Machines for Producing Files and Rasps, of which thefolloi ing is a specification.

The present invention relates to a new machine for producing tiles andrasps, which machine as compared with hitherto well known machines inspite of simpler construction has a greater output and produces a betterarticle. This advance is attained in the first place by improving themechanism for moving the slide and further by improving the settingdevice for transmitting motion to the slide.

A machine according to the present invention is represented by way ofexample in the accompanying drawing, in which Figure 1 shows the settingdevice for transmitting motion from the cam to the working slide, Fig. 2a diagrammatic view of the gear for operating the cam, and Fig. 3 thedistribution of the rasp teeth on the rasp.

The cutting tool is moved as in the case of the well known machines andconsequently the gear for effecting the motion is not shown. The motionof the slide carrying the work, that is the article being operated upon,is derived from the shaft 1 by means of the eccentric 2, the eccentricrod 3, the pawl 1 and the ratchet wheel 5. This ratchet wheel has forexample as many teeth as are to be cut on the file during the travel ofthe cutting tool to and fro across the tile. The ratchet wheel 5 istogether with a cam 7 keyed firmly on the shaft 6. The cam 7 is soformed that it consists of two halves symmetrical about the center-lineA-B, any two radii at a given angle to one another on either halfdiffering in length by a constant amount. On the cam 7 there runs theroller 8 which by means of the lever 9 transmits to the slide carryingthe file the movements produced by the cam. In Fig. 2 for example, thepawl has moved forward through the space of one tooth and the roller 8rests at the point 10 against the cam. On each addi tional forwardmovement the roller would come against one of the points indicated bysmall circles. For purposes of adjustment the rod 3 may be provided witha turnbuckle 3*.

Fig. 1 shows the gearing transmitting motion from the lever 9 throughthe double armed lever 11, the chain 12 and the claw 13 to the slide 1don which the file 16 to be cut lies on a support 15. The longitudinalslide 11 rests in the transverse slide 17. The transverse slide 17 runsin the guide 18 which is arranged on the machine body. If the transverseslide 17 is connected firmly with the machine body 19 by means of thescrew 20, then the slide 14 will be turned when the lever 9 moves. Thecam 7 rotates for example in the direction of the arrow I and the roller8 is therefore raised and the lever 9 turned counter clockwise so thatit acts on the intermediate member 22, the same being a nut adjustablealong a face of lever 9 to vary their point of contact, by means of ahand operated screw 21 and crank 32, which move pivotally with lever 11,the result being that the lever 11 is turn-ed clockwise and the slide 11; with the file 16 counter-cloclnvise by means of the chain 12.and theclaw 13. The clockwise rotation of the slide 141 is effected by means ofa spring 23, chain 2 1 and claw 25 as soon as the highest point of thecam 7 has passed the roller 8. The opposite end of the spring 23 to thatat which the chain 21 is connected is secured to the doublearmed lever27 mounted revolubly on the bolt 26, said lever resting through theinstrumentality of the intermediate member 28 on an eccentric 29. Thishas the following purpose in the above described arrangement. Thetension of the spring 23 keeps the roller 8 firmly in contact with thecam 7. In order during the interval between the forward movements of thecam 7 to hold it in the position into which it is brought by the pawland ratchet gear shown in Fig. 2, it is necessary to provide means forbraking the cam 7.. The braking action necessary is proportional to thetension of the spring 23. Since the braking of the cam 7 means the samething as loss of work the present invention possesses the additionalimportant advantage that the ten sion of the spring 23 is kept asconstant as possible. This is effected by the eccentric 29, since whilethe roller 8 is raised during the rotation of the cam 7 in the directionof the arrow I and the tension of the spring 23 thereby increased, thearm of the lever 27 to which the spring is attached sinks on account ofthe rotation of the eccentric 29. By choosing a correct ratio of the onelever arm to the other the effect can consequently be obtained that thetension of the spring 23 is always only as great as is necessary formoving the work shde. Further if the eccentric 29 be correctly keyed onthe shaft the spring acts on the shaft 6 which is common to the cam 7and to the eccentric 29 in such a manner as to tend to produce rotationin the direction of the arrow III. On account of this it is suflicientto exert a very slight braking action on the cam 7. This is eifected byforming the eccentric 29 as a brake-disk and the intermediate member 28as a brake-block. In order entirely to do away with the idle travel inthe setting device the claws 13 and 25 are divided. Consequently thetension of the spring 23 acts through the chain 24: on the slide 14 andthrough the latter on the claw 13, chain 12, double armed lever 11,lever 9, roller 8 and cam 7. The said claw 13 overlaps removableregulating bar or block 31. By substituting a thicker or thinner barunder said claw for the one shown, the movement of slide 14 will becorrespond ingly regulated and varied.

In order to be able to vary the magnitude of the movements obtained bymeans of one and the same cam 7 gearing in the form of the double-armedlever 11 and the lever 9 is geared in between the roller 8 and the chain12. Between said levers 11 and 9 there moves the piece 22 which can beadjusted by means of the crank 32 and the worm 21 and by the movement ofwhich the effective length of the lever arm of the lever 9 and that ofthe lever 11 is varied so that the gear can be quickly varied. Incorrespondence with this change of the gear the point of attachment 33of the spring 23 in the slot 34: of the lever 27 can be varied so thatthe tension of the spring 23 remains as constant as possible.

There is an advantage in having the claws 25 and 13 arranged to overlapthe extreme lateral parts of the slide 14 as shown as they get a bettergrip and leverage than if connected thereto at intermediate points.These claws and the intervening curved metal trough or cradle for saidslide may be in one piece.

As shown in Fig. 3 the teeth are often formed in rows which break-jointwith each other, the teeth being arranged in quincunX order on the faceof the rasp. This is most conveniently effected by varying the feed ofthe blank operated on so as to move it alternatively farther or less farlaterally at regular intervals or by similarly the cutting tool. It isdeemed not necessary to illustrate or describe means for such lateralfeed or shifting in the present application, the same not being claimedherein nor necessary to the comprehension of this invention.

lVhat I claim as my invention and desire to secure by Letters Patentis 1. In mechanism for reciprocating the work carrier of a file or raspmachine, a pawl and ratchet and means for operating the same, a cammoving with said ratchet and adjusting means for transmitting motionfrom said cam to the work carrier, the latter means comprising a partrocked by said cam, a nut movable along a surface of said part andactuated thereby, and an adj usting screw adapted to move said nut alongsaid surface for varying the leverage exerted by said part and themovement correspondingly transmitted to said carrier.

2. The combination of a work carrier for rasp or file blanks, with acam, means for rotating said cam, a lever rocked by said cam, an elementadjustable in position and arranged for contact with said lever, asecond lever moving in connection with said element, a flexibleconnection between said second lever and said work carrier and means forcausing the return movement of said work carrier.

3. In a machine for producing files and rasps the combination of a workcarrier and means for reciprocating the same, said means comprising apawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending syn'lmetrically formedcam, connected with said ratchet wheel, means for transmitting motionfrom said cam to the work carrier, a spring for returning theworkcarrier, means connecting one end of said spring with the workcarrier, a counter-support connected with the other end of the springand means for moving said countersupport substantially in unison withthe first-mentioned end of the spring during the forward motion of thework-carrier for the purpose of maintaining the force exerted by thespring substantially constant.

4. In a machine for producing files and rasps the combination of awork-carrier and means for reciprocating the same said means comprisinga pawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending symmetrically formed camconnected with said ratchet wheel, and means for transmitting motionfrom said cam to the work carrier a spring for returning the workcarrier, means connecting one end of said spring with the work carrier,a counter-support connected with the other end of the spring and meansfor moving said counter-support substantially in unison with thefirst-mentioned end of the spring during the forward motion of thework-carrier for the purpose of maintaining the force exerted by thespring substantially constant, said means for moving the counter-supportcomprising an eccentric connected wit-h the cam.

In a machine for producing files and rasps the combination of a workcarrier and means for reciprocating the same said means comprising apawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending symmetrically formed camconnected with said ratchet wheel, and means for transmitting motionfrom said cam to the work carrier, a spring for returning the workcarrier, means connecting one end of said spring with the work carrier,a counter-support connected with the other end of the spring and meansfor moving said counter-support substantially in unison with thefirst-mentioned end of the spring during the forward motion of thework-carrier for the purpose of maintaining the force exerted by thespring substantially constant, said means for moving the counter-supportcomprising an eccentric connected with the cam said eccentric being inthe form of a brake-disk.

6. In a machine for producing files and rasps the combination of a workcarrier and means for reciprocating the same said means comprising apawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending symmetrically formed camconnected with said ratchet wheel, and means for transmitting motionfrom said cam to the work carrier a spring for returning the workcarrier, means connecting one end of said spring with the work-carrier,a counter support connected with the other end of the spring, a twoarmed lever supporting said countersupport on one arm, a brake-blockmounted on the other arm, an eccentric in the form of a brake-diskengaging with said brakeblock and connected with the cam the relativeposition of all said elements being such that the counter-support ismoved substantially in unison with the first-mentioned end of the springfor the purpose of maintaining substantially constant the force exertedby the spring. V

7. In a machine for producing files and rasps the combination of a workcarrier and means for reciprocating the same said means comprising apawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending symmetrically formed camconnected with said ratchet wheel and means transmitting motion fromsaid cam to the workcarrier, said means engaging with said carrier bymeans of a claw 13, a spring for re turning the work carrier, meansconnecting one end of said spring with the work carrier, said meansengaging with said carrier by means of a claw 25, a counter-supportconnected with the other end of the spring and means for moving saidcounter-support substantially in unison with the first-mentioned end ofthe spring during the forward motion of the work carrier for the purposeof maintaining the force exerted by the spring substantially constant.

8. The combination of a work carrier for file and rasp blanks, with acam having two corresponding operative faces, means for rotating saidcam, a lever rocked by said cam, a nut arranged for contact with saidlever, a hand operated adjusting screw engaging said nut and moving italong a surface of said lever, a second lever moving in connection withand being adjusted by said adjusting screw and nut, a chain connectingthe latter lever to said carrier and means for causing the reversemotion of said carrier after being acted on by said cam, levers andchain substantially as set forth.

9. In a machine for producing files and rasps the combination of a workcarrier and means for reciprocating the same said means comprising apawl, means for reciprocating the latter, a ratchet wheel engaged bysaid pawl, a uniformly ascending and descending symmetrically formed camconnected with said ratchet wheel, and means for transmitting movementfrom said cam to the work carrier, said movement transmitting meanscomprising a pivoted lever bearing against the cam, a second pivotedlever provided with a piece removably mounted and making contact withthe first-mentioned lever, and means for adjusting the position of saidpiece on said second lever, a spring for returning the work carriermeans connecting one end of said spring with the work carrier, acounter-support connected with the other end of the spring and means formoving said counter-support substantially in unison with thefirst-mentioned end of the spring during the forward motion of the workcarrier for the purpose of maintaining the force exerted by the springsubstantially constant.

In testimony whereof I aflix my signature in presence of two witnesses.

GOTTLIEB PEISELER. [L- s.] lVitnesses OTTO KoNio,

IVILLY KLEIN.

